公开(公告)号：US08664356B2

公开(公告)日：2014-03-04

申请号：US12904942

申请日：2010-10-14

申请人： Samuel Helmer Gellman ,  Li Guo ,  Michael Giuliano

发明人： Samuel Helmer Gellman ,  Li Guo ,  Michael Giuliano

IPC分类号： C07K7/06 ,  C07C229/46 ,  C07K5/08

CPC分类号： C07C205/44 ,  C07C201/12 ,  C07C205/55 ,  C07C233/48 ,  C07C237/24 ,  C07C269/00 ,  C07C271/24 ,  C07C271/66 ,  C07C2601/08 ,  C07C2601/14 ,  C07D211/56 ,  C07D211/60 ,  C07K5/0205 ,  C07K5/06078 ,  C07K5/1016 ,  C07K7/06

摘要： The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a proline derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.).The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ-amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.

摘要翻译： 本发明提供了化合物和方法，例如，用醛进行有机催化迈克尔加成循环受限的由脯氨酸衍生物催化的硝基乙烯化合物以提供循环约束的α-取代的γ-硝基醛。 当使用手性吡咯烷催化剂时，可以使反应呈现对映选择性，允许以几乎光学纯的形式（例如，96至> 99％e.e。）的迈克尔加合物。 迈克尔加合物可以承受单个取代基或与羰基相邻的双取代基。 迈克尔加合物可以有效转化为循环受限的受保护的γ-氨基酸残基，这对于γ-肽折叠物的系统构象研究至关重要。 还提供了新的方法来制备其它γ-氨基酸和肽。 这些新的构建块可用于制备在溶液中和固体状态下采用特定螺旋构象的折叠物，例如α/γ-肽折叠物。

公开(公告)号：US08617707B2

公开(公告)日：2013-12-31

申请号：US12988992

申请日：2009-03-24

申请人： Todd D. Krauss ,  Christopher Evans ,  Li Guo ,  Jeffrey J. Peterson

发明人： Todd D. Krauss ,  Christopher Evans ,  Li Guo ,  Jeffrey J. Peterson

IPC分类号： B32B5/16

CPC分类号： C01B19/007 ,  B82Y30/00 ,  C01G1/12 ,  C01P2002/84 ,  C01P2004/04 ,  C01P2004/64 ,  C09K11/661 ,  C09K11/881 ,  Y10T428/2982 ,  Y10T428/2991

摘要： Disclosed herein are magic size nanoclusters comprising lead and one or more chalcogens. The disclosed magic size nanoclusters have both spectrally narrow fluorescence and ultra-high quantum efficiencies. Further disclosed herein is a method for preparing PbS, PbSe, and PbTe magic size nanoclusters. The yield of magic size nanoclusters can be increased by using anion sources enriched for secondary phosphines. The use of enriched secondary phosphine anion sources also increases the yield of quantum nanostructures.

摘要翻译： 本文公开了包含铅和一种或多种硫属元素的魔术尺寸纳米团簇。 所公开的魔术尺寸纳米团簇具有光谱窄的荧光和超高的量子效率。 本文进一步公开的是制备PbS，PbSe和PbTe魔术尺寸纳米团簇的方法。 通过使用富含次膦的阴离子源，可以增加魔术大小的纳米团簇的产率。 富集的次膦阴离子源的使用也增加了量子纳米结构的产率。

公开(公告)号：US08320273B2

公开(公告)日：2012-11-27

申请号：US12749920

申请日：2010-03-30

申请人： Hang Jin ,  Li Guo ,  Hanqing Lou

发明人： Hang Jin ,  Li Guo ,  Hanqing Lou

IPC分类号： H04L12/28 ,  H04B7/216

CPC分类号： H04L1/0034 ,  H04L1/0035

摘要： Link adaptive retransmission techniques are provided for use in connection with wireless communications between a first wireless communication device and a second wireless communication device. The first wireless communication device generates M packet error information values for the transmit session of a packet based on whether an acknowledgment message or a non-acknowledgment message is received from the second wireless communication device for a transmission and for previously sent transmissions even if less than M transmissions are sent by the first wireless communication device to the second wireless communication device upon completion of the transmit session. The first wireless communication device computes a retransmission fading margin based on the M packet error information values, from which an effective carrier-to-interference-plus-noise ratio is derived for selection of a modulation scheme.

摘要翻译： 链路自适应重传技术被提供用于结合第一无线通信设备和第二无线通信设备之间的无线通信。 第一无线通信设备基于是否从第二无线通信设备接收到用于传输的确认消息或非确认消息，以及对于先前发送的传输，即使小于等于，也产生用于分组的发送会话的M个分组错误信息值 在发送会话完成时，M个传输由第一无线通信设备发送到第二无线通信设备。 第一无线通信设备基于M个分组误差信息值来计算重发衰落余量，从而从其导出用于选择调制方案的有效载波干扰加噪声比。

公开(公告)号：US08306001B2

公开(公告)日：2012-11-06

申请号：US12687181

申请日：2010-01-14

申请人： Genyuan Wang ,  Li Guo ,  Hanqing Lou ,  Hang Jin

发明人： Genyuan Wang ,  Li Guo ,  Hanqing Lou ,  Hang Jin

IPC分类号： H04B7/216

CPC分类号： H04B7/0617 ,  H04B7/063 ,  H04W72/046

摘要： Techniques are provided to improve wireless beamformed communication between first and second wireless communication devices. At a plurality of antennas of the first wireless communication device (e.g., a base station) uplink transmissions sent from the second wireless communication device (e.g., a client or mobile device or station) are received. The first wireless communication device generates a downlink beamforming weight vector from received uplink transmissions, and computes a covariance matrix for received uplink transmissions. The first wireless communication device stores history information based on the covariance matrices for received uplink transmissions. The first wireless communication device computes first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information. The first wireless communication device uses the first and second beamforming-space time code weight vectors for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device.

摘要翻译： 提供技术来改善第一和第二无线通信设备之间的无线波束形成的通信。 在第一无线通信设备（例如，基站）的多个天线处，从第二无线通信设备（例如，客户机或移动设备或站）发送的上行链路传输被接收。 第一无线通信设备从接收到的上行链路传输生成下行链路波束成形加权向量，并且计算用于接收的上行链路传输的协方差矩阵。 第一无线通信设备基于接收到的上行链路传输的协方差矩阵存储历史信息。 第一无线通信设备基于用于当前帧中接收的上行链路传输的协方差矩阵和历史信息来计算第一和第二波束形成空间时间码权重向量。 第一无线通信设备使用波束形成空间时间码传输技术的第一和第二波束形成空间时间码权重向量来向第二无线通信设备发送下行链路传输。

公开(公告)号：US20120264388A1

公开(公告)日：2012-10-18

申请号：US13086643

申请日：2011-04-14

申请人： Li Guo ,  Hang Jin ,  Paul J. Stager ,  Neil R. Diener ,  Matthew A. Silverman ,  Chandra Vaidyanathan

发明人： Li Guo ,  Hang Jin ,  Paul J. Stager ,  Neil R. Diener ,  Matthew A. Silverman ,  Chandra Vaidyanathan

IPC分类号： H04B1/10

CPC分类号： H04B7/0865 ,  H04B17/345

摘要： Interference in an unlicensed frequency band is spatially filtered out from received signals at a wireless device operating in the unlicensed frequency band. Energy received at a plurality of antennas of the wireless is device is analyzed to detect interference in the unlicensed frequency band. The detected interference is classified by type. Parameters for a nulling filter are generated or selected based on the type of interference detected in the received energy. During a time interval when it is expected to receive desired signals, the nulling filter is applied using the parameters to signals obtained from energy received at the plurality of antennas during the time interval.

摘要翻译： 未经授权的频带中的干扰在从未接收的频带中工作的无线设备的接收信号中被空间滤除。 对在无线的多个天线处接收的能量进行分析，以检测未许可频带中的干扰。 检测到的干扰按类型分类。 基于在接收能量中检测到的干扰类型来生成或选择归零滤波器的参数。 在预期接收期望信号的时间间隔期间，使用参数将归零滤波器应用于在时间间隔期间从在多个天线接收的能量获得的信号。

公开(公告)号：US08280426B2

公开(公告)日：2012-10-02

申请号：US12608285

申请日：2009-10-29

申请人： Li Guo ,  Genyuan Wang ,  Hanqing Lou ,  Hang Jin

发明人： Li Guo ,  Genyuan Wang ,  Hanqing Lou ,  Hang Jin

IPC分类号： H04B7/005

CPC分类号： H04W52/42 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/086

摘要： Techniques are provided for improving performance of a multiple-input multiple-output (MIMO) wireless communication system. At a first wireless communication device (e.g., a base station) having a plurality of antennas, uplink transmissions are received from a second wireless communication device (e.g., a client device). The base station determines a measure of multipath conditions between it and the second wireless communication device based on the received uplink transmissions. The base station applies downlink beamforming weight vectors together with power balance and phase adjustment factors depending on the measure of multipath conditions to transmit multiple downlink data streams across the plurality of antennas simultaneously to the second wireless communication device.

摘要翻译： 提供了用于改善多输入多输出（MIMO）无线通信系统的性能的技术。 在具有多个天线的第一无线通信设备（例如，基站）处，从第二无线通信设备（例如，客户端设备）接收上行链路传输。 基站基于所接收的上行链路传输来确定其与第二无线通信设备之间的多径条件的测量。 基站根据多径条件的测量，将多个下行链路数据流同时发送到第二无线通信设备，基站根据功率平衡和相位调整因子来应用下行链路波束成形加权向量。

公开(公告)号：US08195240B2

公开(公告)日：2012-06-05

申请号：US12103406

申请日：2008-04-15

申请人： Hang Jin ,  John Grabner ,  Li Guo ,  Qingwen Liu

发明人： Hang Jin ,  John Grabner ,  Li Guo ,  Qingwen Liu

IPC分类号： H04W40/00 ,  H04J3/00

CPC分类号： H04W16/28 ,  H04W48/12 ,  H04W72/048

摘要： A hybrid time-spatial multiplexing technique is provided for beamforming broadcast messages to mobile stations that may be within a coverage region or cell of a base station. The coverage region is divided into a plurality of segments. The mobile stations are assigned to at least one of the segments based on their locations within the coverage region or other criteria. The base station computes beamforming antenna weights which are configured to produce a radiation beam pattern from a plurality of antennas of the base station to respective ones of each of the plurality of segments in the region. A broadcast message is transmitted to each segment of the region in a time-division multiplexed manner using the beamforming antenna weights associated with the radiation beam pattern for the corresponding segment.

摘要翻译： 提供混合时空复用技术用于向可能在基站的覆盖区域或小区内的移动台发送波束成形广播消息。 覆盖区域被分成多个段。 基于其在覆盖区域内的位置或其他标准，移动站被分配给至少一个段。 基站计算波束成形天线权重，其被配置为从该基站的多个天线到该区域中的多个段中的每一个的相应的一个的相应的一个波段图形。 使用与用于相应段的辐射束图案相关联的波束成形天线权重，以时分复用方式将广播消息发送到该区域的每个段。

公开(公告)号：US07965783B2

公开(公告)日：2011-06-21

申请号：US11957433

申请日：2007-12-15

申请人： Li Guo ,  Hang Jin

发明人： Li Guo ,  Hang Jin

IPC分类号： H04L23/02

CPC分类号： H04B7/043 ,  H04B7/0617 ,  H04B7/086 ,  Y02D70/444

摘要： A method and apparatus are provided for transmitting data streams in a wireless multiple-input-multiple-output (MIMO) communications system. The method comprises receiving a plurality of signals by a first mobile station, the plurality of signals being transmitted from antennas on a second mobile station, computing a plurality of beamforming weighting vectors from the received plurality of signals, calculating a pre-coding parameter matrix for a beamformed MIMO channel between the first and second mobile stations using the plurality of beamforming weighting vectors and the plurality of signals, determining a normalized transmitting power distribution for data streams transmitted via the beamformed MIMO channel, allocating transmitting power to the beamformed MIMO channel, wherein the data streams are transmitted via the beamformed MIMO channel having an optimized transmitting power distribution.

摘要翻译： 提供了一种用于在无线多输入多输出（MIMO）通信系统中传输数据流的方法和装置。 该方法包括由第一移动台接收多个信号，该多个信号是从第二移动台上的天线发送的，从接收到的多个信号中计算多个波束成形加权向量，计算一个预编码参数矩阵， 使用多个波束形成加权向量和多个信号在第一和第二移动站之间的波束形成的MIMO信道，确定经由波束形成的MIMO信道发送的数据流的归一化的发射功率分布，为波束形成的MIMO信道分配发射功率，其中 通过具有优化的发射功率分布的波束形成的MIMO信道传输数据流。

公开(公告)号：US20110118440A1

公开(公告)日：2011-05-19

申请号：US12904942

申请日：2010-10-14

申请人： Samuel Helmer Gellman ,  Li Guo ,  Michael Giuliano

发明人： Samuel Helmer Gellman ,  Li Guo ,  Michael Giuliano

IPC分类号： C07K7/06 ,  C07C229/46 ,  C07K5/08

CPC分类号： C07C205/44 ,  C07C201/12 ,  C07C205/55 ,  C07C233/48 ,  C07C237/24 ,  C07C269/00 ,  C07C271/24 ,  C07C271/66 ,  C07C2601/08 ,  C07C2601/14 ,  C07D211/56 ,  C07D211/60 ,  C07K5/0205 ,  C07K5/06078 ,  C07K5/1016 ,  C07K7/06

摘要： The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a proline derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.).The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ-amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.

摘要翻译： 本发明提供了化合物和方法，例如，进行有机催化迈克尔加成醛到由脯氨酸衍生物催化的周期受限的硝基乙烯化合物以提供循环约束的α-取代的γ-硝基醛。 当使用手性吡咯烷催化剂时，可以使反应呈现对映选择性，允许以几乎光学纯的形式（例如，96至> 99％e.e。）的迈克尔加合物。 迈克尔加合物可以承载单个取代基或与羰基相邻的双取代基。 迈克尔加合物可以有效地转化为循环受限的受保护的γ-氨基酸残基，这对于γ-肽折叠物的系统构象研究至关重要。 还提供了新的方法来制备其它γ-氨基酸和肽。 这些新的构建块可用于制备在溶液中和固体状态下采用特定螺旋构象的折叠物，例如α/γ-肽折叠物。

公开(公告)号：US20110105172A1

公开(公告)日：2011-05-05

申请号：US12608285

申请日：2009-10-29

申请人： Li Guo ,  Genyuan Wang ,  Hanqing Lou ,  Hang Jin

发明人： Li Guo ,  Genyuan Wang ,  Hanqing Lou ,  Hang Jin

IPC分类号： H04B7/005

CPC分类号： H04W52/42 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/086

摘要： Techniques are provided for improving performance of a multiple-input multiple-output (MIMO) wireless communication system. At a first wireless communication device (e.g., a base station) having a plurality of antennas, uplink transmissions are received from a second wireless communication device (e.g., a client device). The base station determines a measure of multipath conditions between it and the second wireless communication device based on the received uplink transmissions. The base station applies downlink beamforming weight vectors together with power balance and phase adjustment factors depending on the measure of multipath conditions to transmit multiple downlink data streams across the plurality of antennas simultaneously to the second wireless communication device.

摘要翻译： 提供了用于改善多输入多输出（MIMO）无线通信系统的性能的技术。 在具有多个天线的第一无线通信设备（例如，基站）处，从第二无线通信设备（例如，客户端设备）接收上行链路传输。 基站基于所接收的上行链路传输来确定其与第二无线通信设备之间的多径条件的测量。 基站根据多径条件的测量，将多个下行链路数据流同时发送到第二无线通信设备，基站根据功率平衡和相位调整因子来应用下行链路波束成形加权向量。